ASTM F2785-20e1
(Specification)Standard Specification for Polyamide 12 Gas Pressure Pipe, Tubing, and Fittings
Standard Specification for Polyamide 12 Gas Pressure Pipe, Tubing, and Fittings
SCOPE
1.1 This specification covers requirements and test methods for the characterization of polyamide 12 pipe, tubing, and fittings for use in fuel gas mains and services for direct burial and reliner applications. The pipe and fittings covered by this specification are intended for use in the distribution of natural gas.
1.1.1 Pipe and fittings covered by this specification shall not be joined using taper pipe threads. Butt fusion joining shall be done in accordance with Practice F3372. Design considerations are discussed in Appendix X1. In-plant quality control programs are specified in Annex A1.
1.2 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: Pipe and fittings utilizing heat fusion joining techniques produced from compounds meeting the requirements of Group 3, Class 2, and Grade 3 (PA323 or PA11) are intended for use with pipe manufactured from compounds meeting the requirements of Group 3, class 2 and Grade 3. Pipe and fittings utilizing heat fusion joining techniques produced from compounds meeting the requirements of Group 4, Class 2 and Grade 3 (PA 423 or PA12) are intended for use with pipe manufactured from compounds meeting the requirements of Group 4, Class 2 and Grade 3. As per the recommendations of the respective resin manufacturers, no cross fusion between PA 323 (PA11) and PA 423 (PA12) compounds is permitted.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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´1
Designation:F2785 −20 An American National Standard
Standard Specification for
1
Polyamide 12 Gas Pressure Pipe, Tubing, and Fittings
This standard is issued under the fixed designation F2785; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1
ε NOTE—Table 4 was editorially corrected in April 2021.
1. Scope* 1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This specification covers requirements and test methods
ization established in the Decision on Principles for the
for the characterization of polyamide 12 pipe, tubing, and
Development of International Standards, Guides and Recom-
fittings for use in fuel gas mains and services for direct burial
mendations issued by the World Trade Organization Technical
and reliner applications. The pipe and fittings covered by this
Barriers to Trade (TBT) Committee.
specification are intended for use in the distribution of natural
gas.
2. Referenced Documents
1.1.1 Pipeandfittingscoveredbythisspecificationshallnot
2
be joined using taper pipe threads. Butt fusion joining shall be 2.1 ASTM Standards:
doneinaccordancewithPracticeF3372.Designconsiderations D543 Practices for Evaluating the Resistance of Plastics to
are discussed in Appendix X1. In-plant quality control pro- Chemical Reagents
grams are specified in Annex A1. D618 Practice for Conditioning Plastics for Testing
D648 Test Method for Deflection Temperature of Plastics
1.2 Thetextofthisspecificationreferencesnotes,footnotes,
Under Flexural Load in the Edgewise Position
and appendixes which provide explanatory material. These
D638 Test Method for Tensile Properties of Plastics
notesandfootnotes(excludingthoseintablesandfigures)shall
D789 Test Method for Determination of Relative Viscosity
not be considered as requirements of the specification.
of Concentrated Polyamide (PA) Solutions
1.3 The values stated in inch-pound units are to be regarded
D792 Test Methods for Density and Specific Gravity (Rela-
as standard. The values given in parentheses are mathematical
tive Density) of Plastics by Displacement
conversions to SI units that are provided for information only
D1598 Test Method for Time-to-Failure of Plastic Pipe
and are not considered standard.
Under Constant Internal Pressure
D1599 Test Method for Resistance to Short-Time Hydraulic
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the Pressure of Plastic Pipe, Tubing, and Fittings
3
D1898 Practice for Sampling of Plastics (Withdrawn 1998)
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter- D1600 TerminologyforAbbreviatedTermsRelatingtoPlas-
tics
mine the applicability of regulatory limitations prior to use.
D2122 Test Method for Determining Dimensions of Ther-
NOTE 1—Pipe and fittings utilizing heat fusion joining techniques
moplastic Pipe and Fittings
produced from compounds meeting the requirements of Group 3, Class 2,
D2774 PracticeforUndergroundInstallationofThermoplas-
andGrade3(PA323orPA11)areintendedforusewithpipemanufactured
from compounds meeting the requirements of Group 3, class 2 and Grade tic Pressure Piping
3. Pipe and fittings utilizing heat fusion joining techniques produced from
D2290 Test Method for Apparent Hoop Tensile Strength of
compoundsmeetingtherequirementsofGroup4,Class2andGrade3(PA
Plastic or Reinforced Plastic Pipe
423 or PA12) are intended for use with pipe manufactured from com-
D2837 Test Method for Obtaining Hydrostatic Design Basis
pounds meeting the requirements of Group 4, Class 2 and Grade 3.As per
forThermoplasticPipeMaterialsorPressureDesignBasis
the recommendations of the respective resin manufacturers, no cross
fusion between PA 323 (PA11) and PA 423 (PA12) compounds is
for Thermoplastic Pipe Products
permitted.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This test method is under the jurisdiction of ASTM Committee F17 on Plastic contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Piping Systems and is the direct responsibility of Subcommittee F17.60 on Gas. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Dec. 1, 2020. Published December 2020. Originally the ASTM website.
3
approved in 2009 as F2785–09. Last previous edition approved in 2018 as The last approved version of this historical standard is referenced on
F2785–18a. DOI: 10.1520/F2785-20. www.astm.org.
*A Summary of Changes section appears at the e
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: F2785 − 20 F2785 − 20 An American National Standard
Standard Specification for
1
Polyamide 12 Gas Pressure Pipe, Tubing, and Fittings
This standard is issued under the fixed designation F2785; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1
ε NOTE—Table 4 was editorially corrected in April 2021.
1. Scope*
1.1 This specification covers requirements and test methods for the characterization of polyamide 12 pipe, tubing, and fittings for
use in fuel gas mains and services for direct burial and reliner applications. The pipe and fittings covered by this specification are
intended for use in the distribution of natural gas.
1.1.1 Pipe and fittings covered by this specification shall not be joined using taper pipe threads. Butt fusion joining shall be done
in accordance with Practice F3372. Design considerations are discussed in Appendix X1. In-plant quality control programs are
specified in Annex A1.
1.2 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notes and
footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
NOTE 1—Pipe and fittings utilizing heat fusion joining techniques produced from compounds meeting the requirements of Group 3, Class 2, and Grade
3 (PA323 or PA11) are intended for use with pipe manufactured from compounds meeting the requirements of Group 3, class 2 and Grade 3. Pipe and
fittings utilizing heat fusion joining techniques produced from compounds meeting the requirements of Group 4, Class 2 and Grade 3 (PA 423 or PA12)
are intended for use with pipe manufactured from compounds meeting the requirements of Group 4, Class 2 and Grade 3. As per the recommendations
of the respective resin manufacturers, no cross fusion between PA 323 (PA11) and PA 423 (PA12) compounds is permitted.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D543 Practices for Evaluating the Resistance of Plastics to Chemical Reagents
1
This test method is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.60 on Gas.
Current edition approved Dec. 1, 2020. Published December 2020. Originally approved in 2009 as F2785–09. Last previous edition approved in 2018 as F2785–18a. DOI:
10.1520/F2785-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F2785 − 20
D618 Practice for Conditioning Plastics for Testing
D648 Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
D638 Test Method for Tensile Properties of Plastics
D789 Test Method for Determination of Relative Viscosity of Concentrated Polyamide (PA) Solutions
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D1598 Test Method for Time-to-Failure of Plastic Pipe Under Constant Internal Pressure
D1599 Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings
3
D1898 Practice for Sampling of Plastics (Withd
...
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